Means for molding a roof or floor slab

Abstract

A form for moulding a roof or intermediate floor slab for a substantially rectangular enclosure, the form comprising a plurality of substantially rectangular panels each defining a flat substantially rectangular moulding surface, the panels being designed so that they can be arranged and supported in chessboard array to define a substantially flat continuous moulding surface extending over said enclosure, said array being supported by an edge secured to the walls of the enclosure or to the form for casting these walls.

I claim: 
     
       1. A form for slabs and the like, for moulding a roof or intermediate floor slab for a substantially rectangular enclosure, the form comprising a plurality of substantially rectangular panels each defining a substantially rectangular moulding surface, the panels being arranged in chess-board array to define a moulding surface adapted to extend over said enclosure, said plurality of panels comprising a first edge-panel and a series of panels, some of which are also edge-panels, said edge-panels being those which are positionable along an edge of said enclosure, said first edge-panel having at least one edge adapted to be rested against means defining said enclosure and supported by support means secured to said means defining said enclosure, the edges of this first edge-panel which are not adapted to rest against said means defining said enclosure comprising means for supporting a corresponding edge of the panels of said series of panels, which are to be positioned adjacent to said first edge-panel, all but one of the panels of this series of panels having means on either one or two of their edges to support an adjacent panel, and the edge-panels of said series of panels having at least one of their edges adapted to be supported by the support means secured to the means defining the enclosure; each panel which is provided with means to support an adjacent panel along two adjacent edges also comprising means for receiving a strut, these strut receiving means being formed in a corner defined by said adjacent edges, and a plurality of struts each supporting one of said panels which have strut receiving means. 
     
     
       2. A form as claimed in claim 1, wherein each panel further comprises, at its edges, means for resisting lateral forces exerted thereon. 
     
     
       3. A set of parts for the assembly of a form for moulding a roof or intermediate floor slab for a substantially rectangular enclosure defined by four lateral surfaces, the arrangement comprising a first group of substantially rectangular panels, a second group of substantially rectangular panels, and one third substantially rectangular panel, each panel having four edges and each panel defining a moulding surface; support means protruding from each of only two adjacent edges of the panels of the first group and from only one edge of the panels of the second group, said third panel having no such support means, said support means each being arranged to support a panel edge which is not provided with said support means when these last two mentioned edges are positioned one against another to thereby define a moulding surface; and means adapted to be secured to said lateral surfaces for supporting at least one panel edge of the panels of said first and second groups which are to be positioned adjacent said lateral surfaces and which are not provided with protruding support means, and for supporting two edges of said third panel; each of said panels of the first group further comprising means for receiving a strut, these strut receiving means being formed in a corner defined by said adjacent edges and a plurality of struts each for supporting one of said panels which have strut receiving means. 
     
     
       4. A set of parts as defined in claim 3, wherein each panel further comprises, at its edges, means for resisting lateral forces exerted thereon. 
     
     
       5. A set of parts as defined in claim 3, wherein said support means which protrude from each panel of the first and second groups comprise an upturned lip which extends along an edge of the panel and a channel defined between said lip and its corresponding edge. 
     
     
       6. A set of parts as defined in claim 5, wherein said panel edges which are are not provided with support means comprise a reinforcing member adapted to be tightly received within said channel. 
     
     
       7. A set of parts as defined in claim 3, wherein said means for receiving a strut is a tube and said strut is of adjustable length. 
     
     
       8. A set of parts as defined in claim 3, wherein the lateral surfaces defining the enclosure are the walls thereof. 
     
     
       9. A set of parts as defined in claim 3, wherein the lateral surfaces defining the enclosure are forms for casting the walls of the enclosure.